Off-axis single-key symmetry degree measuring device and measuring method

Abstract

The invention discloses an off-axis single-key symmetry degree measuring device and an off-axis single-key symmetry degree measuring method. The off-axis single-key symmetry degree measuring device comprises a measuring device body and a positioning block, wherein the positioning block is arranged at the lower part of a cross rod of the measuring device body, and one end of the positioning block is clamped in a single-key groove of a workpiece to be measured during measurement; and the middle part of a vertical rod of the measuring device body is connected with a dial indicator, the top end of the dial indicator is connected with a measuring head of a cylindrical structure, and the measuring head is in contact with a workpiece for measuring a symmetry degree. The positioning block matched with the groove width of the processed workpiece is adopted, the positioning block is clamped into the single-key groove to serve as a positioning reference of the whole measuring device, the positioning is precise and reliable, the dial indicator is matched with the measuring head in the shape of a cylindrical surface, thus the measuring head can be in contact with the highest point of an excircle section of the workpiece, and the influence of the roundness of the excircle section and straightness errors can be ignored.

Description

technical field [0001] The invention belongs to the technical field of parts measurement, and in particular relates to an off-axis single-bond symmetry measurement device and a measurement method. Background technique [0002] There are two types of measurement methods for the symmetry of the outer single keyway of shaft products: one is to use the symmetry gauge method, the advantage is that it can realize rapid measurement on the processing site, the disadvantage is that no specific data can be obtained, and it is not helpful for the adjustment of the machine tool; the other is With the help of the V-shaped block, use the workpiece flipping method or the three-coordinate method to obtain the deviation value of the keyway center relative to the shaft center line, and then calculate the symmetry value. The disadvantage of this method is that it takes 4 to 6 minutes on average. The advantage is that it can get The direction and value of the deviation of the single keyway from...

AI Technical Summary

Problems solved by technology

[0002] There are two types of measurement methods for the symmetry of the outer single keyway of shaft products: one is to use the symmetry gauge method, the advantage is that it can realize rapid measurement on the processing site, the disadvantage is that no specific data can be obtained, and it is not helpful for the adjustment of the machine tool; the other is With the help of the V-shaped block, use the workpiece flipping method or the three-coordinate method to obtain the deviation value of the keyway center relative to the shaft center line, and then calculate the symmetry value. The disadvantage of this method is that it takes 4 to 6 minutes on average. The advantage is that it can get The direction and value of the deviation of the single keyway from the central axis are convenient for timely adjustment of machine tool processing data

[0003] The second type of measurement method is time-consuming, coupled with queuing and downtime waiting time, the shift output cannot be guaranteed

In addition, during the full-scale inspection of the final inspection process, if the number of workpieces is large, the contradictions exposed by the above method will be more prominent, so a method and measuring tool that is convenient for on-site measurement are urgently needed

Images